A red mole on chest may be vascular nevus, purpura, liver disease, bright red nevus and other diseases. 1. Vascular nevus: also called cherry-like hemangioma, may be related to age, sun exposure, hormone metabolism and other factors. It belongs to benign skin tumors, resulting in the appearance of round red papules of the size of a needle tip to a grain of rice on the local skin, and the color will fade temporarily when pressed. It can be manifested as the phenomenon of red nevus on the chest. 2. Purpura: The more common clinical condition is allergic purpura. This disease is usually caused by vasculitis, which can lead to the rupture of subcutaneous blood vessels, resulting in red spots, ecchymosis and other symptoms, which can also appear as red nevus on the chest. 3. Liver disease: for example, liver disease such as cirrhosis, viral hepatitis and other liver diseases lead to impaired liver function, which affects the inactivation of estrogen, thus leading to the appearance of spider nevus or cherry-like hemangioma on the chest. 4. bright red nevus: most of them belong to congenital capillary malformation. It occurs in the face and neck or other parts of the body, resulting in local skin rash or patch of light red or dark red, partially or completely discolored when pressed, and the color deepens with age. When there is a red nevus on the chest, you can go to the hospital for medical consultation and advice, so that the disease can be clarified and targeted treatment can be carried out as early as possible.